21313002442 has 16 divisors (see below), whose sum is σ = 33864408072. Its totient is φ = 10025397760.

The previous prime is 21313002437. The next prime is 21313002511. The reversal of 21313002442 is 24420031312.

It can be written as a sum of positive squares in 4 ways, for example, as 10032225921 + 11280776521 = 100161^2 + 106211^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50683 + ... + 212590.

Almost surely, 2^21313002442 is an apocalyptic number.

21313002442 is a deficient number, since it is larger than the sum of its proper divisors (12551405630).

21313002442 is a wasteful number, since it uses less digits than its factorization.

21313002442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265673.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 21313002442 its reverse (24420031312), we get a palindrome (45733033754).

The spelling of 21313002442 in words is "twenty-one billion, three hundred thirteen million, two thousand, four hundred forty-two".